JP5997572B2 - Grinding equipment - Google Patents

Description

  The present invention relates to a grinding apparatus.

  As a grinding wheel for grinding a processed surface, there is one in which an annular grindstone member is attached to the outer peripheral surface of a disk member (see, for example, Patent Document 1). In such a grinding wheel, the processed surface can be ground by rotating the circular center of the disc member around the rotation center and bringing the outer peripheral surface of the grindstone member into contact with the processed surface. Moreover, when a processed surface is concave shape, a processed surface can also be ground with the side surface of a grindstone member.

  However, in the above-described grinding wheel, the grinding liquid hardly enters between the side surface of the grindstone member and the processing surface, and thus the temperature of the processing surface is likely to rise excessively. Therefore, by spraying a high pressure and a large amount of grinding fluid between the side surface of the grindstone member and the machining surface, the grinding fluid is infiltrated between the side surface of the grinding wheel member and the machining surface. In addition to the need for a large amount, the grinding fluid is sprayed at a high pressure, so that a lot of grinding fluid is reflected on the grinding wheel and scattered, resulting in increased mist generation.

  Therefore, the present inventors have invented a grinding wheel that can efficiently supply a grinding fluid to a grinding wheel member (see Patent Document 2). As shown in FIG. 6, the grinding wheel 100 includes a disk member 101 and an annular wheel member 102, and a liquid supply hole 110 penetrating the disk member 101 in the thickness direction is formed. One end of the liquid supply hole 110 is an inflow port 111, and the other end is a discharge port 112. An outer peripheral wall 120 is formed on the outer side in the radial direction of the disc member 101 from the inlet 111 of the liquid supply hole 110. With such a configuration, the grinding liquid is guided to the inflow port 111 along the outer peripheral wall portion 120, and thus is efficiently supplied to the grindstone member 102. Therefore, the supply amount of the grinding fluid can be reduced and generation of mist can be suppressed.

JP-A-5-31674 International Publication No. 2012/077755

  In the grinding wheel 100 described above, the grinding fluid is supplied while rotating the disc member 101. Therefore, the grinding fluid that has flowed in a timely manner passes through the fluid supply hole 110 and flows from the discharge port 112 to the vicinity of the grinding stone member 102. However, the grinding fluid that has flowed away from the workpiece machining position P may flow out to the outside without being supplied to the workpiece machining position. Therefore, there is a problem that the supply amount of the grinding fluid becomes larger than necessary, and there is room for further improvement.

  Then, this invention makes it a subject to provide the grinding device which can raise the supply efficiency of the grinding fluid to the grindstone member, and can reduce the supply amount of a grinding fluid.

In order to solve the above problems, the present invention is a grinding apparatus having a grinding wheel comprising a disk member and an annular grinding wheel member provided on an outer peripheral edge of one side surface of the disk member, The disc member is provided with a liquid supply hole for supplying the grinding fluid to the one side surface, and the grinding fluid supplied to the one side surface flows out to the outside around the grinding wheel. An outer frame member to be prevented is provided so as to cover the grinding wheel, and a part of the outer frame member corresponding to a workpiece machining position is allowed to face a part of the grinding wheel member to the outside and the workpiece is placed at the workpiece machining position. An opening is formed to be installed on the outer frame member, a part of the outer frame member is disposed to face the one side surface, and a part of the outer frame member near the center Protruding parts that are close enough not to interfere with one side are formed A grinding apparatus characterized by that.

According to such a configuration, the grinding fluid that has flowed away from the workpiece machining position is blocked by the outer frame member and does not flow outside from the portion other than the opening. That is, since all the grinding fluid flowing out to the outside passes through the workpiece machining position, the grinding fluid can be efficiently supplied to the workpiece machining position. Therefore, the supply amount of the grinding fluid can be reduced. Moreover, a workpiece | work can be easily installed in a workpiece | work processing position through an opening part. Further, the grinding fluid flows along a part of the outer frame member and is guided to the workpiece machining position. As a result, the grinding fluid can be supplied more efficiently.

  The invention according to claim 2 is characterized in that the work supported from the outside of the outer frame member is inserted into the opening toward the work machining position. According to such a structure, it can process, moving a workpiece | work.

  According to the grinding device of the present invention, it is possible to increase the supply efficiency of the grinding fluid to the grindstone member and reduce the supply amount of the grinding fluid.

It is sectional drawing which showed the grinding apparatus which concerns on 1st embodiment of this invention. It is the top view which showed the grinding wheel. It is a looking up view of a grinding device for explaining a flow of grinding fluid. It is sectional drawing which showed the modification of the grinding apparatus which concerns on 1st embodiment of this invention. It is sectional drawing which showed the grinding device which concerns on 2nd embodiment of this invention. It is sectional drawing which showed the conventional grinding device.

  Embodiments of the present invention will be described in detail with reference to the drawings as appropriate. In the description of each embodiment, the same constituent elements are denoted by the same reference numerals, and redundant descriptions are omitted.

(First embodiment)
As shown in FIG. 1, the grinding device 1 a according to the first embodiment includes a grinding wheel 2, an outer frame member 3 a, and a grinding fluid supply device 4. The grinding device 1a is a vertical grinding device in which the rotation shaft 5 of the grinding wheel 2 is arranged in the vertical direction.
The grinding wheel 2 includes a disc member 10 and an annular grindstone member 20 attached to the outer peripheral edge portion of the lower surface 10A (one side surface) of the disc member 10.

  The disk member 10 is a member that rotates about the center of the circle as a center of rotation by connecting the rotation shaft 5 to the center. The disk member 10 is a metal part using steel or the like and has sufficient rigidity.

As shown in FIGS. 1 and 2, a peripheral wall portion 11 is formed on the outer peripheral edge portion of the upper surface 10 </ b> B (the other side surface) of the disc member 10. The peripheral wall portion 11 is raised along the outer peripheral edge portion of the disk member 10. Specifically, the peripheral wall portion 11 is raised in the normal direction of the upper surface 10B (upward direction in FIG. 1). The inner peripheral surface 12 of the peripheral wall portion 11 (the inner peripheral wall surface of the peripheral wall portion 11) was reduced in diameter from the proximal end side (lower side in FIG. 1) to the distal end side (upper side in FIG. 1). It is formed with an inversely tapered inclined surface. A wedge-shaped corner is formed by the upper surface 10 </ b> B of the disk member 10 and the inner peripheral surface 12 of the peripheral wall portion 11. A boundary portion between the peripheral wall portion 11 and the upper surface 10B constitutes a step portion 13.
The inner peripheral surface of the peripheral wall portion is not limited to the inclined configuration, and may be perpendicular to the surface of the peripheral wall portion.

  The disc member 10 has a liquid supply hole 15 penetrating from the lower surface 10A (one side surface) to the upper surface 10B (the other side surface). The liquid supply hole 15 is a flow path for guiding and supplying the grinding liquid to the processing position P of the workpiece W. The liquid supply hole 15 includes a discharge port 16 opened at the outer peripheral edge of the lower surface 10A and an inlet 17 opened at the upper surface 10B. The liquid supply hole 15 is configured by a through hole having a circular cross section that is formed in a straight line from the lower surface 10A to the upper surface 10B. The inflow port 17 is formed inside the radial direction of the disc member 10 with respect to the discharge port 16. That is, the liquid supply hole 15 is formed so as to be inclined so as to proceed to the outside of the disk member 10 from the inlet 17 toward the discharge port 16. In the present embodiment, the inclination angle of the liquid supply hole 15 coincides with the inclination angle of the inner peripheral surface 12 of the peripheral wall portion 11.

The inflow port 17 is formed in the radially inner portion of the disc member 10 with respect to the peripheral wall portion 11. The inflow port 17 is opened on the upper surface 10 </ b> B so that the outer peripheral line is in contact with the inner peripheral surface 12 of the peripheral wall portion 11. As a result, the inner peripheral surface 12 of the peripheral wall portion 11 and the outer surface of the liquid supply hole 15 are connected in a straight line (see FIG. 1), so that the grinding fluid flows smoothly into the liquid supply hole 15.
A plurality of liquid supply holes 15 are formed and arranged radially at equal intervals in the circumferential direction of the disk member 10 (see FIG. 2).

  As shown in FIG. 2, the grindstone member 20 is a cylindrical grindstone. In this embodiment, a CBN (cubic boron nitride) grindstone is used, but the material is not limited, and various known grindstones can be used. The upper end surface of the grindstone member 20 is fixed to the outer peripheral edge portion of the lower surface 10 </ b> A of the disc member 10. The outer peripheral diameter of the grindstone member 20 is equal to the outer peripheral diameter of the disc member 10.

  The outer frame member 3a is a member that is provided around the grinding wheel 2 and prevents the grinding fluid that has flowed to the lower surface 10A of the disk member 10 from flowing out. The outer frame member 3 a is formed in a box shape having an outer cylindrical shape so as to surround the grinding wheel 2. The outer frame member 3 a includes an upper plate portion 30, a side plate portion 31, and a bottom plate portion 32. In the outer frame member 3 a, the upper plate portion 30, the side plate portion 31, and the bottom plate portion 32 are appropriately divided and partially integrated so that the outer frame member 3 a can be mounted surrounding the disc member 10.

  For example, the side plate portion 31 and the bottom plate portion 32 are integrally formed in a bottomed cylindrical shape, and the upper plate portion 30 is formed as a separate flat plate. The upper plate part 30 is formed with an insertion hole 33 through which the rotary shaft 5 is inserted. The upper plate portion 30 is fixed to a bearing portion (fixed system) that rotatably supports the rotary shaft 5. The side plate portion 31 is formed in a cylindrical shape. The bottom plate portion 32 is formed in a substantially disc shape having a diameter equivalent to the outer diameter of the side plate portion 31. In addition, as will be described later, a part of the disk shape is cut off. The bottom plate part 32 which is a part of the outer frame member 3a. It is located below the disk member 10 and is disposed to face the lower surface 10A (one side surface) of the disk member 10. The bottom plate portion 32 is close to the lower surface 10 </ b> A as long as it does not interfere with the lower grindstone member 20 of the disk member 10. The bottom plate portion 32 serves to prevent the grinding fluid from dropping downward and to guide the grinding fluid toward the workpiece machining position P.

As shown in FIGS. 1 and 3, an opening 35 is formed in a portion corresponding to the workpiece processing position P among the lower end portion of the side plate portion 31 and the peripheral portion of the bottom plate portion 32. The opening 35 is for allowing a part of the grindstone member 10 to be exposed to the outside and for inserting the workpiece W into the outer frame member 3a to be installed at the workpiece processing position P. The shape and size of the opening 35 are appropriately set according to the shape of the workpiece W.
The shape of the outer frame member 3a is not limited to the above shape, and can be changed as appropriate.

  The workpiece W is supported by a support device 7 provided outside the outer frame member 3a. A part of the workpiece W supported from the outside is inserted into the opening 35 toward the workpiece processing position P inside the outer frame member 3a. That is, the workpiece W is installed at the workpiece machining position P in a state where a part of the workpiece W protrudes from the outer frame member 3a.

  The supply device 4 includes, for example, an injection nozzle 40 and a supply pipe 41. The injection nozzle 40 is disposed so as to face the upper surface 10B of the disk member 10. The injection nozzle 40 sprays the grinding liquid to the center side of the disc member 10 from the peripheral wall portion 11 in the upper surface 10B. The supply pipe 41 passes through a through hole (not shown) formed in the upper plate portion 30 or the side plate portion 31. One end of the supply pipe 41 is connected to the injection nozzle 40, and the other end of the supply pipe 41 is connected to a grinding liquid supply source (not shown).

  In the grinding device 1a having the above-described configuration, the grinding liquid is sprayed vertically from the spray nozzle 40 of the supply device 4 onto the upper surface 10B while rotating around the circle center of the disc member 10 as the rotation center. Then, the grinding fluid flows to the inlet 17 while spreading in the circumferential direction of the disk member 10 by centrifugal force, passes through the liquid supply hole 15, and flows from the discharge port 16 to the lower surface 10 </ b> A side of the disk member 10. It is.

  At this time, the grinding fluid that has flowed in the vicinity of the workpiece machining position P flows directly between the workpiece W and the grindstone member 20, but the grinding fluid that has flowed away from the workpiece machining position P is retained by the disk member 10. It falls from the lower surface 10A. In the present embodiment, by receiving the dropped grinding fluid by the bottom plate portion 32 of the outer frame member 3a, the outflow of the grinding fluid can be suppressed. Here, the grinding fluid is received at the outer peripheral edge of the bottom plate portion 32 as shown in FIG. By the way, on the bottom plate portion 32, the air rotates together with the rotation of the disk member 10, and a rotating airflow R is generated. As shown by the arrows in FIG. 3, the grinding fluid received by the rotating airflow R at the outer peripheral edge portion of the bottom plate portion 32 is caused to flow along the rotation direction on the bottom plate portion 32, and finally the workpiece machining. Guided to position P. Then, the grinding fluid that has flowed to the workpiece machining position P hits the side surface of the workpiece W or the like and is scattered and supplied to the machining portion on the upper surface of the workpiece W.

As described above, according to the grinding apparatus 1a according to the present embodiment, the grinding fluid that has flowed away from the workpiece processing position P is received by the bottom plate portion 32 of the outer frame member 3a and the disc member 10 The workpiece is guided to the workpiece machining position P by the rotating airflow R generated by the rotation. In other words, the grinding fluid does not flow out from the outside of the opening 35 but always passes (passes) the workpiece machining position P when it flows out. Therefore, the grinding fluid can be efficiently supplied to the workpiece processing position P, and the supply amount of the grinding fluid can be reduced.
Further, by providing the opening 35, the workpiece W can be easily installed from the outside to the workpiece machining position P.

(Modification)
In the said embodiment, although the baseplate part 32 was formed in the disk shape without a level | step difference, it is not limited to this. As shown in FIG. 4, a protruding portion 34 that protrudes upward may be formed in a portion near the center of the bottom plate portion 32 a to provide a step. The upper surface of the projecting portion 34 is so close that it does not interfere with the lower surface 10 </ b> A of the disk member 10. The protruding portion 34 may be formed by pressing a part of the bottom plate portion 32a (see FIG. 4), or the block-shaped protruding portion may be fixed to the upper surface of the flat bottom plate portion.
The other parts are the same as those shown in FIG. 1 and are therefore denoted by the same reference numerals and the description thereof is omitted.

  Thus, since the clearance between the lower surface 10A of the disc member 10 and the bottom plate portion 32a is narrowed by forming the protruding portion 34 on the bottom plate portion 32a, a rotating air current is easily generated due to the rotation of the disc member 10. The grinding fluid can be guided to the workpiece processing position P even more efficiently.

  Although not shown, as another modification, the bottom plate portion may be inclined so that the vicinity of the opening portion is lowered. According to such a configuration, the grinding liquid dropped on the bottom plate portion can be caused to flow to the workpiece machining position by gravity.

(Second embodiment)
As shown in FIG. 5, the grinding device 1 b according to the second embodiment includes a pair of upper and lower grinding wheels 2 and 2, an outer frame member 3 b, and a pair of upper and lower supply devices 4 and 4. In the grinding apparatus 1b, the grinding wheels 2 and 2 are arranged in the vertical direction, and both are installed in the horizontal direction. The grinding device 1b is a vertical double-side grinding device that grinds both surfaces of the workpiece W. The rotating shaft 5 that supports the grinding wheel 2 and the supply device 4 are also arranged symmetrically in the vertical direction.

  The grinding wheel 2 has the same configuration as that of FIG. In addition, since the top and bottom of the grinding wheel 2 arranged on the lower side is opposite to that of FIG. 1, what was referred to as the “lower surface 10 </ b> A” in the first embodiment is referred to as “the processed side surface 10 </ b> A” in the second embodiment. In other words, what was referred to as “upper surface 10B” in the first embodiment is referred to as “supply side surface 10B” (the other side surface) in the second embodiment. That is, in the grinding wheel 2 disposed on the upper side, the lower surface of the disk member 10 is the processed side surface 10A, and the upper surface is the supply side surface 10B. On the other hand, in the grinding wheel 2 arranged on the lower side, the upper surface of the disk member 10 is the processed side surface 10A, and the lower surface is the supply side surface 10B.

  In the pair of upper and lower grinding wheels 2, 2, the wheel members 20, 20 face each other, and are disposed with a gap between the wheel members 20, 20. The workpiece W is installed in the gap between the grindstone members 20 and 20 and is subjected to double-side grinding.

The outer frame member 3b is formed in a box shape having an outer cylindrical shape so as to surround the pair of upper and lower grinding wheels 2 and 2. The outer frame member 3b includes an upper plate portion 36, a side plate portion 37, and a bottom plate portion 38. In the outer frame member 3b, an upper plate portion 36, a side plate portion 37, and a bottom plate portion 38 are appropriately divided and partially integrated so that they can be mounted surrounding the upper and lower disk members 10.
In the present embodiment, for example, the side plate portion 37 is vertically divided, and an upper side plate portion (hereinafter referred to as “upper plate portion”) 37a and an upper plate portion 36 are integrally formed in a covered cylindrical shape, A side plate portion (hereinafter referred to as “lower plate portion”) 37b and a bottom plate portion 38 are integrally formed in a bottomed cylindrical shape. The upper plate portion 36 and the bottom plate portion 38 are formed with insertion holes 33 through which the rotary shaft 5 is inserted. The upper plate portion 36 is fixed to a bearing portion (fixed system) that rotatably supports the upper rotary shaft 5, and the bottom plate portion 38 is a bearing portion (fixed system) that rotatably supports the lower rotary shaft 5. It is fixed to. Both the upper plate portion 37a and the lower plate portion 37b are formed in a cylindrical shape. The upper plate portion 37a has a smaller diameter than the lower plate portion 37b, and the lower end portion of the upper plate portion 37a is inserted inside the upper end portion of the lower plate portion 37b.

  The lower end of the upper plate portion 37a extends below the grindstone member 20 of the lower grinding wheel 2, and the lower end portion of the upper plate portion 37a covers the gap between the grindstone members 20 and 20 from the side. It is configured as follows. An opening 39 is formed in a portion corresponding to the workpiece machining position P in the lower end portion of the upper plate portion 37a. The opening 39 is an opening for inserting the workpiece W and installing it at the workpiece machining position P. The shape and size of the opening 39 are appropriately set according to the shape of the workpiece W.

  The workpiece W is inserted from the opening 39 to the workpiece machining position P (between the upper and lower grindstone members 20 and 20) while being supported by the support device 7 provided outside the outer frame member 3b. The support portion of the support device 7 has a shape that can be inserted into the opening 39. Here, the workpiece W is installed at the workpiece machining position P in a state where a part of the workpiece W protrudes from the outer frame member 3b.

The upper end of the lower plate portion 37b extends to an intermediate portion of the height of the grindstone member 20 of the lower grinding wheel 2, and the upper end portion of the lower plate portion 37b and the lower end portion of the upper plate portion 37a overlap. Yes. Since the upper end of the lower plate portion 37b does not protrude above the grindstone member 20, it does not interfere with the workpiece W installed at the workpiece machining position P.
The shape of the outer frame member 3b is not limited to the above shape, and can be changed as appropriate.

  In the grinding apparatus 1b configured as described above, the upper and lower disk members 10 and 10 are rotated and ground vertically from the injection nozzles 40 and 40 of the upper and lower supply apparatuses 4 and 4 with respect to each supply side surface 10B. Spray each liquid. Then, the grinding fluid flows to the inlet 17 while spreading in the circumferential direction of the disk member 10 due to centrifugal force, passes through the liquid supply hole 15, and from the discharge port 16 to the processing side surface 10 </ b> A side of the disk member 10. Washed away. Also in the lower disk member 10, the inner peripheral surface 12 and the liquid supply hole 15 of the peripheral wall portion 11 are inclined so as to advance toward the outside of the disk member 10 toward the downstream side of the flow of supply of the grinding liquid. Therefore, the grinding liquid is caused to flow to the processing side surface 10A by centrifugal force.

  At this time, the grinding fluid that flows in the vicinity of the workpiece machining position P in the upper grinding wheel 2 flows directly between the workpiece W and the grinding wheel member 20, but the grinding fluid that flows away from the workpiece machining position P. Falls from the processed side surface 10 </ b> A of the disk member 10. In the present embodiment, by receiving the dropped grinding liquid at the processing side surface 10A of the disk member 10 of the lower grinding wheel 2, the outflow of the grinding liquid can be suppressed.

  Here, the grinding fluid dropped on the processing side surface 10A of the disc member 10 of the lower grinding wheel 2 is combined with the grinding fluid supplied from the lower supply device 4 and the workpiece is processed by the rotation of the disc member 10. Carried to position P.

  In the workpiece machining position P, a large amount of grinding fluid flows from the machining side surface 10A of the disc member 10 of the lower grinding wheel 2 in particular, so that the grinding fluid hits the side surface of the workpiece W and the processed portions on both sides of the workpiece W. Will be supplied scattered.

  On the other hand, it is possible to prevent the grinding fluid blown outward from the gap between the upper and lower grinding stone members 20 and 20 by centrifugal force from being dammed by the upper plate portion 37a and scattered outside. The grinding liquid dammed up by the upper plate portion 37a falls on the bottom plate portion 38, and is then collected and reused.

As described above, according to the grinding device 1b according to the present embodiment, the grinding fluid that has flowed away from the workpiece processing position P is dammed to the processing side surface 10A of the lower disk member 10, and the workpiece It is guided to the processing position P. Therefore, the grinding fluid can be efficiently supplied to the workpiece machining position P, and the supply amount of the grinding fluid can be reduced. Further, the grinding fluid that has been blown outward is blocked by the upper plate portion 37a of the outer frame member 3b and does not flow out to the outside.
Further, by providing the opening 39, the workpiece W can be easily installed at the workpiece machining position P.

  The embodiment of the present invention has been described above, but the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the spirit of the present invention. For example, in the above-described embodiment, the vertical grinding apparatuses 1a and 1b have been described as an example. However, the present invention can also be applied to a horizontal grinding apparatus in which the rotation axis of the grinding wheel is disposed in the lateral direction. . In this case, the outer frame member is preferably installed so as to cover the periphery of the grinding wheel, and the opening is preferably formed below the outer frame member. With such a configuration, the grinding fluid blocked by the outer frame member flows into the opening by gravity and is guided to the workpiece machining position.

  Furthermore, in the said embodiment, although the supply apparatus 4 is provided with the injection nozzle 40, it is not limited to the said embodiment, It can change suitably. For example, a grinding fluid supply path is formed at the center of the rotating shaft 5, a liquid supply hole (not shown) penetrating the central portion of the disk member 10 is formed, and the lower surface 10 </ b> A (processing side surface) of the disk member 10 is formed. The configuration may be such that the grinding fluid is supplied from the center of 10A).

DESCRIPTION OF SYMBOLS 1a Grinding device 1b Grinding device 2 Grinding wheel 3a Outer frame member 3b Outer frame member 4 Supply device 10 Disk member 10A Lower surface, processing side surface (one side surface)
10B Upper surface, supply side surface (the other side surface)
DESCRIPTION OF SYMBOLS 15 Supply hole 16 Discharge port 17 Inflow port 20 Grinding stone member 30 Upper plate part 31 Side plate part 32 Bottom plate part 35 Opening part 36 Upper plate part 37 Side plate part 37a Upper side plate part 37b Lower side plate part 38 Bottom plate part 39 Opening part W Work P Work processing position

Claims (2)

A grinding apparatus having a grinding wheel comprising a disc member and an annular grindstone member provided on an outer peripheral edge of one side surface of the disc member,
The disc member is provided with a liquid supply hole for supplying a grinding liquid to the one side surface,
Around the grinding wheel, an outer frame member for preventing the grinding liquid supplied to the one side surface from flowing out is provided so as to cover the grinding wheel.
In the portion corresponding to the workpiece processing position of the outer frame member, an opening for placing a part of the grindstone member to the outside and setting the workpiece at the workpiece processing position is formed,
A part of the outer frame member is disposed to face the one side surface,
The grinding apparatus according to claim 1, wherein a protruding portion that is close to a center of the outer frame member is formed so as not to interfere with the one side surface. The grinding apparatus according to claim 1, wherein the workpiece supported from the outside of the outer frame member is inserted into the opening toward the workpiece machining position.

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